Thanks for query,
There might be more than one problems in the ears of your mother,
1,She might have fungal infection
in the ears as there is itching.
2,Chronic matiditis,there is bony projection behind the ears called mastoid infection
in this sinus
leads to mastoiditis
3,There may be autosclerosis in the three small bones in the middle ears causing hearing problem.
Go for antibiotic course,cleaning of external ears will remove fungus,put anti fungal drops.
If medical treatment does not give relief then she should go for surgery..
Ok and bye.